6820679 has 4 divisors (see below), whose sum is σ = 6829920. Its totient is φ = 6811440.

The previous prime is 6820663. The next prime is 6820711. The reversal of 6820679 is 9760286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6820679 - 2⁴ = 6820663 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3407 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (1707480).

Almost surely, 2^6820679 is an apocalyptic number.

6820679 is a deficient number, since it is larger than the sum of its proper divisors (9241).

6820679 is an equidigital number, since it uses as much as digits as its factorization.

6820679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 6820679 is about 2611.6429694734. The cubic root of 6820679 is about 189.6454977989.

The spelling of 6820679 in words is "six million, eight hundred twenty thousand, six hundred seventy-nine".